First Order Mapping of Primary and Secondary Road Network Road Data - Rwanda Metadata - Final version
1 GEODATABASE CONTENT The geodatabase for Rwanda data (RW_Data.mdb) contains 5 feature class : 1. RW_Roads (polyline) 2. RW_Adm1 (polygon) 3. RW_Adm2 (polygon) 4. RW_Adm3 (polygon) 5. RW_Cities (point) All feature class are in Geographic Coordinate System, WGS 84 2 RW_ROADS CONTENT Note : the attributes of RW_Roads are the same as the Excel spreadsheet (RW_Data.xls) 2.1 ATTRIBUTES 1 UNIFORM_ID ID of the link Numeric 5 0 et 99999 2 ADM2_NAME 3 ADM2_ID 4 ADM3_NAME 5 ADM3_ID Name of the 1 st level of administrative division (province) ID of the first administrative division Name of the secondary administrative division (district) ID of the secondary administrative division Numeric 3 0 et 999 Numeric 3 0 et 999 6 ROAD_ID ID of the road Numeric 4 0 et 9999 7 ROAD_NAME Name of the road String 20 see Table 1 below 8 START_NODE 9 END_NODE Name of the locality where the link starts Name of the locality where the link finishes 10 LINK_NAME Name of the link String 100 11 RD_TYPE World Bank functional classification [ROAD_NAME].[START_NODE]- [END_NODE] 1, 2 or 3 (see Table 2 below) 12 LOCAL_CLS Local classification 1, 2 or 3 (see Table 3 below) 13 LENGTH Length of link (km) Numeric 5 2 0 et 99999 14 ROAD_WIDTH Width of road (m) Numeric 3 2 15 AADT_CODE Classification of condition of traffic 1, 2, 3, 4, 5, 6, 7, 8 or 9 (see Table 4 below)
16 AADT_VALUE Value of condition of traffic Exact value of traffic level 17 AADT_SOURCE Source of traffic 18 SURF_TYPE_CODE Classification of 1, 2, 3, 4 or 5 (see Table 5 surface type below) 19 SURF_TYPE_VALUE Value of surface type String 20 20 SURF_TYPE_SOURCE Source of surface type String 20 21 ROAD_COND_CODE Classification of 1, 2, 3, 4 or 5 (see Table 6 road condition below) 22 ROAD_COND_VALUE Value of road condition String 20 Source of road 23 ROAD_COND_SOURCE condition 24 LANE_NB Number of lanes 2.2 DESCRIPTION OF THE ATTRIBUTES The attributes highlighted in the previous table are described more precisely below : When a numeric data is unknown, it s value is -99 7 - Name of the road (ROAD_NAME): Local name of the road. Table 1 Codification of local name of the road Description Route Nationale (RN) Route de District (RD) Name RN + number RD + number 8/9 - Start Node and End Node (START_NODE and END_NODE) The following abbreviations where used : jct = junction bnd = boundary 11 - World Bank functional classification (RD_TYPE): Level 1 : Primary roads are those that constitute the higher network and that are located outside an urban area. These roads link the national capital to major provincial cities, or to agglomerations playing a major economic or social role, or to crucial agglomerations in the transportation system to terminals, such as ports. This level also includes major roads to neighbouring countries. Level 2 : Secondary roads are collector segments to primary roads. They can be constituted by regional roads or by classified rural roads. These roads connect to major department cities, or to cities playing a relevant economic, social or tourist role. The mobility level is lower than a primary road since these roads are designed for lower speed and shorter distances.
Level 3 : Tertiary roads are local or rural segments with low traffic. Their construction requires lower design standards, since they are used to connect residential areas to commercial zones and to upper road levels. Table 2 Codification of World Bank functional classification Classification Code Primary 1 Secondary 2 Tertiary 3 12 - Local classification (LOCAL_CLS): Administrative classification of the country. Table 3 Codification of local classification Classification Description Code Primary Route Nationale (RN) 1 Secondary Route Nationale en terre (RN) 2 Tertiary Route de District (RD) 3 Unclassified Not surveyed classified roads -99 15 - Traffic classification (AADT_CODE): Annual average of the daily traffic, using the following classes and codes: Table 4 Codification of traffic level Number of vehicles (MDT/Y) Code 0 10 1 10 30 2 30 100 3 100 300 4 300 1 000 5 1 000 3 000 6 3 000 10 000 7 10 000 30 000 8 30 000 100 000 9
16 - Traffic value (AADT_VALUE): Annual average of the daily traffic, expressed in terms of number of Unit of Passenger Vehicle (UPV). Note : these data are for 2003. Light vehicle or van = 1 UVP Heavy vehicle of 5 tons and more = 2 UVP 17 - Traffic source (AADT_SOURCE): Source of the annual average of the daily traffic The source of the data is the Ministry of Infrastructure (MININFRA) of Rwanda. The quality of the MININFRA is good. 18/19 - Type of surface (SURF_TYPE_CODE and SURF_TYPE_VALUE) Table 5 Codification of the type of road surface CODE Type of surface (VALUE) Local description 1 Concrete none 2 Asphalt Route bitumée 3 Surface Treatment Pavements none 4 Gravel Roads none 5 Earth Road Route en terre 20 - Type of surface source (SURF_TYPE_SOURCE) : Source of the type of surface The source of the data is the Ministry of Infrastructure (MININFRA) of Rwanda. The quality of the MININFRA data is good.
21/22 - Condition of the road (ROAD_COND_CODE and ROAD_COND_VALUE) Table 6 Codification of the condition of the road CODE Condition of the road (VALUE) Definition (in accordance with the kind of surface) Recovered Stabilized Not-Stabilized Local description 1 Very good New or rebuilt New or rebuilt New or rebuilt Très bon 2 Good Requires low or no maintenance, such as preventive treatment of cracks sealing Requires just a slight surface preparation or sporadic gravel addition Requires low or no surface preparation Bon 3 Fair Deformed structure which requires reparations without removing the existing paving Requires a new layer of gravel Requires reshaping the surface as well as the maintenance of the drainage system Passable 4 Poor Requires a partial Requires a partial Requires a partial Médiocre 5 Very poor Requires a complete Requires a complete Requires a complete Mauvais et très mauvais 23 - Road condition source (ROAD_COND_SOURCE): Source of the type of surface The source of the data is the Ministry of Infrastructure (MININFRA) of Rwanda. The quality of the MININFRA data is good. 24 - Number of lane (LANE_NB) : The source of the data is the MININFRA 2.3 Data Coverage The following table shows the data coverage (expressed in percentage of total length covered) per functional class (RD_TYPE) RD_TYPE Table 7 Data Coverage DATA COVERAGE ROAD_WIDTH AADT SURF_TYPE ROAD_COND Primary 100 % 85,6% 100 % 100 % Secondary 100 % 68,4% 100 % 100 % Tertiary 100 % 0,0% 100 % 100 % TOTAL 100 % 45,9% 100 % 100 %
3 RW_ADM1 CONTENT This feature class represents the Rwanda 3.1 ATTRIBUTES 1 PERIMETER Perimeter in km Numeric 12 6 0 et 9999999 2 AREA Area in km 2 Numeric 12 6 0 et 9999999 4 RW_ADM2 CONTENT This feature class represents the provinces of Rwanda 4.1 ATTRIBUTES 1 PERIMETER Perimeter in km Numeric 12 6 0 et 9999999 2 AREA Area in km 2 Numeric 12 6 0 et 9999999 3 ADM2_NAME 4 ADM2_CODE Name of the province Code of the province 5 RW_ADM3 CONTENT This feature class represents the districts of Rwanda 5.1 ATTRIBUTES 1 PERIMETER Perimeter in km Numeric 12 6 0 et 9999999 2 AREA Area in km 2 Numeric 12 6 0 et 9999999 3 ADM2_NAME 4 ADM2_CODE Name of the province Code of the province 5 ADM3_NAME Name of the district 6 ADM3_CODE Code of the district
6 RW_CITIES CONTENT This feature class represents the cities of Rwanda 6.1 ATTRIBUTES 1 CITY_NAME Name of the city 2 P_CAPITAL Capital of province 3 D_CAPITAL Capital of district